Improvement in evaporating pans and plants for salt manufacture



I 2Sheets-'-Sheet1.

. e. w; STOBE B. Evapnrat i'ng-Pgans and Plants for Salt Manufacture.

Patented Oct. 28,1873.

Wh-NE 5 SEE:

. 2Sheets--Sheet2. G. W. STORER. Evaporating Pans and Plants for SaltManufacture.

No. 144,159. Patent ed0c't.28,1 873.

Til-122 s35: v Imnma tTNrrnn SrA'rns Prion.

IMPROVEMENT IN EVAPORATING PANS AND PLANTS FOR SALT MANUFACTURE.

Specification forming part of Letters Patent No. 144,159, dated October28, 1873; application filul September 30, 1873.

To all whom it may concern:

Be it known that I, Geo. W. S'ronnn, of Philadelphia, in the county ofPhiladelphia and in the State of Pennsylvania, have invented certain newand useful Improvements in the Method of, and Apparatus for,Manufacturing Salt; and do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings making a part of this specification, in which-Figure 1 is a"perspeetive view of my apparatus, as arranged for use, andFig. 2 is a vertical central section of the apparatus used for cleansingand drying the salt.

Letters of like name and kind refer to like parts in each of thefigures.

The design of my invention is to enable an improved quality of salt tobe produced in a cheap, convenient, and expeditious manner; and itconsists, principally, in the apparatus employed for cleansing anddrying the salt, substantially as is hereinafter shown. "It con sists,further, in the construction, combination, and arrangement of the entireapparatus, substantially as and for the purpose hereinafter set forth. I

In the annexed drawin A represents a steam'boiler, having any desiredconstruc tion, around which are arranged, radially, a series of vats orpans, B and B, and between each pair of the latter two tanks, 0 and C,as shown. The vats B and B are constructed, preferably, with woodensides I) and double metal bottoms 1), between which latter is formed aspace that is connected with the boiler A by means of a pipe, D, andserves to contain steam for the purpose of heating the contents of saidvat. The tanks G are constructed in substantially the same manner as thevats, and their hollow bottoms are in a like manner connected with theboiler A, so so as to enable the heating of their contents.

As thus constructed and arranged, the apparatus is employed in thefollowing manner: One of the tanks is filled wit-h salt-water, and heatapplied to its bottom until said water has attained a sufficienttemperature to cause its impurities to be precipitated, after which itis permitted to cool, and is then drawn into one of the pans or vat-s,where it is subjected to heat until brought to a'state of saturation.While the last part of this operation is being performed the second tankis filled with water, and the impurities of the latter precipitated,after which said water is drawn into said vat, said tanks beingalternately cleansed, filled, heated, and their contents discharged intosaid vats until the latter is filled with water at the point ofsaturation. The water in the vat B, above named, is now drawn into thesecond or finishing-vat B, where evaporation takes place mitil the saltis crystallized, the first vat B, in the meantime, being cleansed andrefilled, as before, nearly all of the impurities remaining in the wateras it leaves the tanks, being deposited in the bottom of said first vat.From the finishing-vat B the salt is conveyed to a drier, which, as seenin Fig. 2, consists of' a cylindrical "essel, l), which has open endsand is, at a point somewhat above its lower end, provided with awovenwire screen or bottom, (7, upon which said salt is to rest. Thelower end of the vessel D is fitted over a projecting annular flange, c,which is attached to, and forms part of, a base, E, in such a manner asto make an air-tight joint. Within the upper port-ion of the base E isformed a chamber, E, which communicates, by means-of a pipe, F, withsuitable apparatus, G, for exhausting air, while, from the lower side ofsaid chamber, a water-pipe, 1H, extends outward and downward. having ahead that corresponds in size and shape to the upper end of the vesselD, is so arranged as to enable it to be moved over the latter, or, whennot in use, turned to one side. Thevessel I) being now filled with saltwater at the point of saturation is showered within its upper end andpasses downward through said salt and out of the dischargepipe H,having, during such passage, dissolved and carried away all remainingimpurities. The wastepipe His now closed, the sprinkler I turned to oneside, and the air-exhausting apparatus setin motion, so as to cause astrong downward,

A shower-bath, I,

2 Midas) By means of my method and a maratus a perfectly pure article ofsalt is produced in a comparatively short time, and with but littlelabor and expense.

Having thus fully set forth the nature and merits of my invention, whatI claim as new is l. The Vessel D, provided with a reticulated bottom,d, and the base E, provided with the chamber E and Waste-opening H,constructed and combined with each other, and with suitablewater-showering and airexhaust-ing apparatus, substantially as and forthe purpose shown.

2. The precipitatiiig-tanks and U, the evaporating-pans B and B, thedrier D and E, and the showerer I, arranged as shown, and combined withsuitable steam-generating and air-exhausting apparatus, substantially asand for the purpose shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this20th day of September, 1873.

GEO. W. STORER. Vitnesses:

Gno. S. PRINDLE, .ToIIN It. YOTING.

